Estimation method for structural parameters of ballistic missile based on elimination of centroid height parameter

A ballistic missile and structural parameter technology, applied in the field of signal processing, can solve problems such as the inability to eliminate the height parameter of the center of mass and the large error of ballistic missiles, and achieve the effect of eliminating influence and improving accuracy

Active Publication Date: 2019-10-11
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, neither of these two types of methods can eliminate the influence of the center of mass height parameter on ...

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  • Estimation method for structural parameters of ballistic missile based on elimination of centroid height parameter
  • Estimation method for structural parameters of ballistic missile based on elimination of centroid height parameter
  • Estimation method for structural parameters of ballistic missile based on elimination of centroid height parameter

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Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] combine figure 1 , the present invention is based on the ballistic missile structural parameter estimation method that centroid height parameter eliminates, comprises the following steps:

[0048] Step 1, establish the geometric model of the ballistic missile target, obtain the instantaneous micro-Doppler theoretical curve of the cone bottom and the instantaneous micro-Doppler theoretical curve of the cone top of the ballistic missile target echo, and use the periodic structure of the instantaneous micro-Doppler curve of the cone bottom objective function.

[0049] Step 1.1, the ballistic missile target precession model of the middle course ballistic missile is as follows figure 2 As shown, OXYZ is a translational coordinate system, and Oxyz is a body coordinate system. The bullet rotates around its symmetry axis Oz with an angular velocity Ω, and a...

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Abstract

The invention discloses an estimation method for structural parameters of a ballistic missile based on elimination of a centroid height parameter. The method comprises the following steps: firstly establishing a target geometric model of the ballistic missile and constructing a target function; then transmitting a single frequency pulse to a target, receiving an echo of the target and conducting time-frequency transform to obtain a time-frequency diagram of the echo; fitting the time-frequency diagram to obtain cone-bottom and cone-top instantaneous micro-Doppler curves; obtaining a precessionperiod of the target according to two adjacent maximal values in the cone-top instantaneous micro-Doppler curve, adding a first half period and a second half period in a period of the cone-bottom instantaneous micro-Doppler curve to obtain a target curve; finally conducting least square on the target curve and the target function to obtain a radius and a precession angle of the target; and usingthe maximal values of the cone-top and cone-bottom instantaneous micro-Doppler curves to obtain a height and a centroid height of the target. The estimation method of the invention eliminates the influence of the centroid height parameter on the structural parameters of the ballistic missile and improves the accuracy for estimating the ballistic missile target.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a ballistic missile structural parameter estimation method based on centroid height parameter elimination. Background technique [0002] When the ballistic missile is flying at high speed in the air, the spin motion maintains the stability of its attitude, and the lateral disturbance will convert the spin motion into a precession form, where the spin refers to the ballistic missile's rotational motion around its own symmetry axis, Motion refers to the rotation of the ballistic missile around the cone axis while spinning. [0003] Space target recognition is a crucial link in the ballistic missile defense system. The mid-stage flight is the longest in the flight process of a ballistic missile, and the space environment is relatively simple. At this time, the target is shown as a small rotation around the center of mass while the target is moving in translation. Precess...

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Application Information

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IPC IPC(8): G01S13/536G01S13/72G01S7/41G01S7/02
CPCG01S13/536G01S13/723G01S7/415G01S7/023
Inventor 陶诗飞陈如山丁大志张晓杰张杰吴维焘黄鑫沂蔡甜甜
Owner NANJING UNIV OF SCI & TECH
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